PLA/改性MMT复合材料的性能  

Properties of PLA/modified MMT composites

作　　者：孙岳玲[1] 董彦祥 沈发治[1] Sun Yueling;Dong Yanxiang;Shen Fazhi(Yangzhou Polytechnic Institute,Yangzhou 225127,China)

机构地区：[1]扬州工业职业技术学院,江苏省扬州市225127

出　　处：《合成树脂及塑料》2017年第3期53-55,60,共4页China Synthetic Resin and Plastics

基　　金：扬州市石油化工新材料工程技术研究中心项目(YZM2015086);江苏省高等学校大学生实践创新训练计划项目(201613754001Y);扬州市科技局市校合作专项项目(YZ2016269)

摘　　要：以十六烷基三甲基溴化铵(CTAB)为改性剂对蒙脱土(MMT)进行改性,将其填充到聚乳酸(PLA)中,采用熔融插层法制备了PLA/改性MMT复合材料,并研究了复合材料的性能。结果表明:添加MMT可提高复合材料的阻燃性能和耐热性能;添加未改性MMT降低了复合材料的力学性能,当其用量为9 phr时,复合材料的拉伸强度从42.1 MPa降至38.6 MPa,断裂拉伸应变从4.5%降至2.2%,冲击强度从15.2 kJ/m^2降至8.6 kJ/m^2;添加适量(3~5 phr)改性MMT可提高复合材料的力学性能,当其用量为5 phr时,复合材料的拉伸强度和断裂拉伸应变均达最大值,分别为47.2 MPa和10.6%,当其用量为3 phr时,复合材料的冲击强度达最大值,为25.2 kJ/m^2。Montmorillonite(MMT)was modified by cetyl trimethyl ammonium bromide(CTAB),then itwas filled into polylactide(PLA)to prepare PLA/modified MMT composites via melt intercalation method.Theproperties of the composites were also studied.The results show that the addition of MMT can improve the flameretardantproperties and the heat resistance of PLA/MMT composites.The addition of unmodified MMT can weakenthe mechanical properties of the composites,the tensile strength of the composites descends from42.1MPa to38.6MPa,tensile stress at break from4.5%to2.2%,and impact strength from15.2kJ/m2to8.6kJ/m2whenMMT is9phr.The addition of modified MMT(3-5phr)enhances the mechanical properties of the composites,the tensile strength and tensile stress at break of the composites reach the highest of47.2MPa and10.6%respectively when modifed MMT is5phr,the impact strength peaks at25.2kJ/m2when modifed MMT is3phr.

关 键 词：聚乳酸 蒙脱土 熔融插层法 复合材料 性能 

分 类 号：TB332[一般工业技术—材料科学与工程]